Hi everyone! I am sooooooo sorry this has taken me so long! I started a new boarding school this year overseas and it took me a while to adjust. Anyway, I hope you all enjoy a bit of angst and feels in this and also warning for swearing later on in the chapter. A special thank you to Roxansmit for your wonderful ideas! Hope you enjoy! Let me know what you think!

Harry squealed loudly as Daddy ran his soapy hands under his arms, clamping them down as hard as he could.

"Hold still, I need to make sure you're clean, otherwise you will smell worse than the owlery," Daddy told him trying to lift his arm again.

"Tickles," Harry said, shaking his head 'no'.

"Harry," Daddy gave him his serious eyes.

Harry thought about it for a moment, then an idea came to him.

"Harry let Daddy do tickles if Daddy let Harry wear his w'obes," Harry said a mischievous glint in his green eyes.

Daddy leaned back from the edge of the bathtub, "You want to wear my robes? Out of our rooms?"

"Nuh uh, just in d'em," Daddy watched him for a moment and Harry wondered if Daddy could read minds with using a spell.

"Deal," Daddy agreed, reaching for his arm again.

Harry grinned and lifted his arm, sucking a big breath to prepare himself for the tickles. Harry let it all out in one whoosh of giggles as Daddy soaped up both of his underarms and then rinsed them. Daddy took a small bucket and poured clean water onto Harry rinsing all of the bubbles and soap off of him.

"Alright, bath time is over, come out dove," Harry (with the help of Daddy) climbed out of the tub and let Daddy wrap the fluffy towel around him. He stood there quietly as he let Daddy dry him, thinking of all the things he wanted to do while he was dressed like Daddy.

Daddy accioed a nappy and the supplies to the bathroom and helped Harry lie down on the floor. Daddy was eyeing him silently as he diapered Harry and pulled a t shirt on him.

"No 'jamas Daddy?' Harry asked confused.

"I assumed you wanted to wear the robes now," Daddy told him. Harry smiled and nodded his head excitedly. He helped Harry stand up.

Taking him by the hand and leading him into his own bedroom and to the ancient looking armoire.

"No going into the kitchen, the house elves just cleaned these," Daddy warned him, pulling out a pristine pair of robes.

Harry nodded seriously, he would take good care of them.

Harry lifted his arms and Daddy slid them over his head, tugging them into place. Daddy's lips curled into a smirk as he gave Harry a once over.

"I believe they are a tad too big,"

Harry giggled, flapping his arms and watching the super long sleeve whip about in the air. The bottom of the robes began dragging around on the stone floor, as Harry ran around Daddy's bedroom barefoot, trying to get them to billow out the way they did when Daddy walked.

He heard Daddy trying to hide his laughter; smirking to himself, Harry dramatically turned around slowly folding his arms across his chest. He had been waiting to do this for years.

He raised one dark eyebrow, narrowing his eyes at Daddy. (Who was smirking himself.)

"Missssstew S'ape." Harry used his lips, to make the 'P' come out with a pop.

"Ou'w new waw' hew'o, tell me what would I get if I added powdered root of askphodel to a-a I'fusion of wormwood?" Harry barked out trying his best to imitate his fathers voice. He watched with surpressed glee as Daddy's eyes widened in surprise and astonishment.

"Don' know? Hmmm, where 'ould you look if I told you to fin' me a bezoar?" Without pausing to let him answer Harry carried on. "Let's tw'y again, whats da' the difference bet'een munskwolf and wolfsbane? Tut tut, cleaw'ly Daddy's don' know everythin'." Harry sniffed haughtily nose in the air, then giggled at Daddy's gobsmacked face.

Daddy stood stock still for a moment, before growling playfully and lunging for Harry. Harry shrieked and dodged him running away from his outstretched hands. Before Harry could make any headway he tripped on the robes, tumbling face first towards the unforgiving stone, he was caught inches from the ground by strong arms holding him safely. Pulling him up, Daddy pressed a kiss to his nose,

"I did not realize you remembered that, dove," He said softly, his eyes unreadable.

"d'is okay Daddy, m'a big boy now!" Harry told him trying to look tough.

"That may be, but I am sorry that I embarrassed you like that," Daddy told him quietly not quite looking at him. Harry held daddy's chin in his hand the other holding his cheek until he looked at him. Harry smiled and kissed Daddy on the nose,

"I love you Daddy, p'ease don' be sad,"

"How can I be sad when I have you in my arms?" Daddy replied, his eyes once again twinkling.

….

After breakfast the next morning, Daddy had stopped in the hallway to talk with one of the astronomy teachers about a potion needed for their class. He had put Harry down next to him, with a stern "Do not move," But that had been ten minutes ago and Daddy was 'bein' borin' talkin' about adult stuff' so, Harry decided to go exploring a little.

Harry had walked down the hallway and turned into another, crashing into something. He fell back, hard, his bum sending a spike of pain up his spine causing him to cry out.

Harry looked up to see what he had bumped into and gulped.

He had bumped into Seamus Finigan, who looked only to pleased to see him.

Seamus crouched down in front of Harry who was still sitting with his legs splayed.

Seamus cooed at him, his voice mocking. "Did the wittle baby fall? Is the babys Daddy gonna kiss it bedder?" Seamus cupped Harrys cheek almost tenderly, his eyes flashing.

"No," Harry said quickly, his heart beating super fast. Seamus made him really nervous.

"Don't interrupt you little freak," Seamus hissed slapping him hard on the cheek causing Harry to gasp in pain and surprise. Pain bloomed across his cheek, the skin throbbing.

"You're so messed up and annoying, I can't understand how anyone could want to be around someone like you,"

Harry felt tears fill his eyes, his throat closing, "Ha-Harry's not annoyin'," he whimpered, his voice trembling. Seamus was still looming over him.

"Why do you think Ron hates you now? He can't bloody stand you,"

The tears spilled over, and Harry couldn't stop them. Harry felt like he couldn't breathe, his throat closing up. Ron really hated him?

"You're just a gross baby," he mocked.

"Har-ry gets gets rid of nappy, an' be's a big boy" he cried to Seamus, looking up at him.

Seamus looked at him dubiously. Harry knew he needed to get rid of it. He concentrated as hard as he could, putting all of his sadness and anger towards his goal. He was going to magic away his nappy.

After two minutes of trying his hardest he felt the soft and comforting material start to deteriorate, the nappy slowly fading into nothing underneath his jean shorts.

Harry opened his eyes and was ready to show Seamus when he noticed that someone else had joined them while he hadn't been paying attention.

Ron.

Harry's heart stopped.

He shakily climbed to his feet the jean material chafing his sensitive skin, the absence of his nappy left him feeling vulnerable and insecure. They watched him in silence, Seamus smirking slightly. Harry stared back bashfully, he really wanted to talk to Ron but he had nothing to say.

"You still have a dummy." Ron pointed out.

"What?"

Seamus pointed at his chest, where Daddy clipped one of his favourite dummy's on his shirt. Harry felt his tummy drop, he couldn't get rid of his dummy.

Harry floundered for a response, "I- er…"

"I'll get rid of it," Ron said, pointing his wand at Harrys chest.

Before Harry could stop him, Ron murmured something, and a flash of yellow light shot out from his wand heading straight for him. Harry flinched back, his bladder releasing itself in fear.

They all stared at each other for a split second before Seamus started cackling. "You really are a baby!"

Looking down he saw that, his shorts were soaked. The material a very dark blue. He had peed all over himself in front of Seamus and Ron.

Harry let out a sob, and turned and ran the other way, trying to put as much distance between him and Seamus and Ron.

He darted into an empty alcove, his knees buckling underneath him. He fell to the floor, crying and whimpering. Ron would never talk to him again after that.

His shorts were really starting to itch him, but he had nothing else to wear. He reached up to get his dummy but his hand only found his shirt. He looked down frantically but it was gone. Ron had magicked it away and now Harry had nothing to give him any comfort.

The only sound was his ragged breathing, and the soft tics that sounded from his tears hitting the stone floor.

He hated being little. He didn't want any of it anymore, not his toys or his crib or even Daddy. Harry wasn't sure what headspace he was in, everything felt really sharp and clear at the same time fuzzy and faraway. But, he couldn't bring himself to care.

Harry didn't know how long he sat there, in a puddle of his own pee, sobbing broken heartedly to himself.

"Harry," Daddy whispered, shock in his voice. Harry jumped, he hadn't heard him coming.

"I'm done," Harry told him, his voice devoid of any emotion.

"Wha-"

Harry interrupted him, "I don't want to be little anymore, I don't need you and I'm leaving Hogwarts,"

"Har-"

"Don't try to stop me," he nearly growled.

He heard Daddy give a small sad sigh, "Can you at least tell me what happened?" he asked him quietly, crouching down next to him.

Harry knew he deserved that much.

Harry took a deep breath letting it out shakily. "I got bored and I decided to go explore and then I bumped in Seamus…." Harry told Snape everything, from the slap, to using magic to get rid of his nappy, wetting himself, and finally about Ron and how he just stared at him.

Snape listened silently, t'sked angrily when he heard about Seamus hurting him.

Harry waited with baited breath. What was Snape going to say?

"I'm so sorry Dove,"

Harry opened his mouth to tell him it wouldn't change how he felt but Snape beat him to it.

"I'm not saying I can change what happened, but I think you're angry and embarrassed which is understandable." While he spoke he quietly cleaned the floor and Harry's shorts with his wand.

"I think you need some time to think it over, now's not the time to make hasty decisions."

"You weren't there!" Harry suddenly yelled. He felt like he was going to explode, he needed Snape to understand how horrible it had been.

"I am aware of that, however-"

"Stop being so fucking calm! I never asked for any of this. My life has been shit for years, I didn't ask for this bloody scar or to be The Boy Who Lived," he sneered the last part.

"Harry I-"

"No! Fuck you! I hate you! I hate being little, I don't deserve this," his voice cracked as more tears came, sliding down his cheeks.

Snape was silent for a moment.

Harry squeezed his eyes shut, trying in vain to stop the tears, he covered his face with his hands. He was pathetic. He jerked when he felt arms encircle him pulling him close. He pressed his face against Snape's chest.

"I did not know you still felt that way,"

Harry sniffled, "I-I loved it for a while, I've never been cared for like that and it was all so new and amazing, but…" He trailed off afraid that Snape would be angry.

"But?"

"But, now I'm confused because I still want it. I can't even imagine living without all of it now, but I also want to be big and be able to fly on my own and….and do…adult things," He finished scared to look at Snape's face.

"I see."

"Are you mad at me?" he asked in an incredibly small voice.

He felt Snape shift, looking up he was now face to face with him. "Of course I'm not mad Harry, to be honest I'm quite upset at myself for not thinking that you might be feeling this way sooner."

His eyes widened, "Really?"

"Yes, I never want you ever fell like this is something you can't escape from. Being a little and letting yourself get into that headspace should always be a positive experience for you. Always. Okay?"

Harry nodded, "Okay" he agreed quietly.

"what if you had big days?"

"What's that?" Harry was starting to find it hard to stay mad, Da-Snape was so warm and he always gave the best hugs.

"We can have specific days were you spend the day in your bigger mindset, and you may do whatever you wish as long as its safe."

"And I can fly?"

Daddy chuckled, "You may fly for as long as you wish, you may even play quidditch with your friends if you so desire,"

Harry smiled, the anger and the tight feeling in his chest finally loosening. He hadn't realized how much it was all bothering him until now but he was really glad that he and Daddy had figured it out.

"I think we should get you changed, and possibly into a new nappy," Daddy told him quietly some minutes later. Harry nodded into his shoulder, too comfortable to move even an inch. He was starting to feel all fuzzy again, like he was sinking into his little headspace but he had more thing he needed to tell Daddy first.

"Can I still love you even when m'big?" he asked slightly slurred as his face was mushed into his robes.

He could have sworn he felt Daddy smile, his magic practically singing with energy.

"Harry, I will love you no matter what headspace you're in," he said kissing the crown of his head.

"Good, cause I wasn' stoppin',"

Daddy tightened his arms around him and stood up, Harry lay his head on his shoulder as Daddy began the descent down to the dungeons. He really did have the best Daddy – Wait, would he have to call Snape Dad on his big days? Or Severus? Oh no! What if he made him call him Professor?!